plastic pipe

Compared to metal pipe, plastic pipe is:

• More difficult to use and requires more maintenance

• Less durable and not flammable

• Strong, durable, and requires little maintenance

• Not affected by temperatures and does not give off toxic fumes

What is a disadvantage of using plastic pipe compared to metal pipe?

• It is less strong

• It cannot be used for plumbing

• It can give off toxic fumes when heated or burned and is flammable

• It is more expensive

Why must plumbers learn how to handle plastic pipe and fittings?

• Because it is the only material allowed in plumbing

• To comply with ancient plumbing traditions

• To safely and properly handle the materials

• Because plastic pipes are not durable

Plumbers must be familiar with:

• Only one type and size of plastic pipe

• Several types and sizes of plastic pipe, each with its own properties

• Only metal pipe and fittings

• Plumbing regulations only

What is the chemical property of most plastic pipes and fittings?

• They are reactive with other substances.

• They are chemically inert.

• They require special coatings to be inert.

• They change properties when in contact with other materials.

What is NOT required during the installation process of plastic pipes?

• Flame for welding or soldering.

• Physical fittings.

• Adhesives.

• Tools for cutting.

What is the characteristic of thermoplastic pipe when it comes to heating and cooling?

• It cannot be softened or hardened by heating and cooling.

• It can only be softened once and then hardens permanently.

• It can be repeatedly softened by heating and hardened by cooling.

• It changes chemically and hardens permanently when heated.

How does thermoset pipe react to heat or chemicals?

• It can be repeatedly softened and hardened.

• It changes chemically when heated and once hardened, it is hardened permanently.

• It does not change its properties when exposed to heat or chemicals.

• It becomes more flexible when heated.

What is the main characteristic of rigid pipe?

• It is flexible and can be used in small diameters.

• It is chemically reactive to heat.

• It is straight and maintains its shape.

• It can be softened and hardened repeatedly.

Why is flexible pipe often referred to as tubing?

• Because it is rigid and maintains its shape.

• Because it is practical only in large diameters.

• Because it is practical only in small diameters.

• Because it changes chemically when heated.